671531650 has 12 divisors (see below), whose sum is σ = 1249048962. Its totient is φ = 268612640.

The previous prime is 671531647. The next prime is 671531683. The reversal of 671531650 is 56135176.

It can be written as a sum of positive squares in 3 ways, for example, as 296218521 + 375313129 = 17211^2 + 19373^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6715267 + ... + 6715366.

Almost surely, 2^671531650 is an apocalyptic number.

671531650 is a deficient number, since it is larger than the sum of its proper divisors (577517312).

671531650 is a wasteful number, since it uses less digits than its factorization.

671531650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13430645 (or 13430640 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 671531650 is about 25913.9277223658. The cubic root of 671531650 is about 875.7002938021.

The spelling of 671531650 in words is "six hundred seventy-one million, five hundred thirty-one thousand, six hundred fifty".